Alphabet of Lines Flashcards
Hierarchy of Line (highest to lowest)
Object line
hidden line
cutting plane line
center line
break line
dimension and extension line
section lines
they are part of a specialized graphic language that is standardized throughout industry
lines
very light, easily erased lines that are used to block the main layout
construction lines/guidelines
are the edges or outlines of an object
visible lines
is used to show surfaces, edges or corners of an object that are hidden from view
hidden object line
are used to show the center of holes and symmetrical features
center lines
used when partial views of symmetrical parts are drawn
symmetry lines
used when dimensioning an object
extension and dimension lines
used to indicate the part of the drawing to which a note refers
leaders
used when it is desirable to shorten the view of a long part or used to indicate part of the object that has been removed
break lines
is used to designate where an imaginary cutting took place
cutting plane line line
used to indicate the surface in the section view imagined to have been cut along the cutting plane line
section lining
used to indicate direction of sight when a partial view is used
viewing plane line
used to indicate alternate position of moving parts, adjacent position of moving parts
phantom lines
